diff options
| author | danglin <danglin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-12-15 05:10:57 +0000 |
|---|---|---|
| committer | danglin <danglin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-12-15 05:10:57 +0000 |
| commit | 2455c36bf85189a56aa9161a997b71f40282d779 (patch) | |
| tree | e8baa9d18aa0f3809f95d03f1a1736703aaf70e5 /gcc/config/pa/som.h | |
| parent | c231e334dff662a02f18c1fc3443b9cf0b73d1b5 (diff) | |
| download | gcc-2455c36bf85189a56aa9161a997b71f40282d779.tar.gz | |
PR c++/17242
* configure.ac: Add GAS check for HP-UX .nsubspa comdat.
* configure, config.in: Rebuilt.
* config/pa/pa-hpux10.h (SUPPORTS_ONE_ONLY, MAKE_DECL_ONE_ONLY): Delete
defines.
* config/pa/pa.c (pa_select_section): Allow uninitialized variables in
one-only (comdat) subspaces.
* config/pa/som.h (SUPPORTS_SOM_COMDAT): New define.
(SUPPORTS_ONE_ONLY): True if SUPPORTS_WEAK or SUPPORTS_SOM_COMDAT are
true.
(MAKE_DECL_ONE_ONLY): Place uninitialized variables in common.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92177 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/pa/som.h')
| -rw-r--r-- | gcc/config/pa/som.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/gcc/config/pa/som.h b/gcc/config/pa/som.h index ac01ca1de4f..96dc2a9077f 100644 --- a/gcc/config/pa/som.h +++ b/gcc/config/pa/som.h @@ -311,11 +311,30 @@ do { \ #define SUPPORTS_WEAK 0 #endif -/* We can support one only if we support weak. */ -#define SUPPORTS_ONE_ONLY SUPPORTS_WEAK +/* CVS GAS as of 4/28/04 supports a comdat parameter for the .nsubspa + directive. This provides one-only linkage semantics even though we + don't have weak support. */ +#ifdef HAVE_GAS_NSUBSPA_COMDAT +#define SUPPORTS_SOM_COMDAT (TARGET_GAS) +#else +#define SUPPORTS_SOM_COMDAT 0 +#endif -/* Use weak (secondary definitions) to make one only declarations. */ -#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) +/* We can support one only if we support weak or comdat. */ +#define SUPPORTS_ONE_ONLY (SUPPORTS_WEAK || SUPPORTS_SOM_COMDAT) + +/* We use DECL_COMMON for uninitialized one-only variables as we don't + have linkonce .bss. We use SOM secondary definitions or comdat for + initialized variables and functions. */ +#define MAKE_DECL_ONE_ONLY(DECL) \ + do { \ + if (TREE_CODE (DECL) == VAR_DECL \ + && (DECL_INITIAL (DECL) == 0 \ + || DECL_INITIAL (DECL) == error_mark_node)) \ + DECL_COMMON (DECL) = 1; \ + else if (SUPPORTS_WEAK) \ + DECL_WEAK (DECL) = 1; \ + } while (0) /* This is how we tell the assembler that a symbol is weak. The SOM weak implementation uses the secondary definition (sdef) flag. |